Undated handout image of Khalid al-Mashadani, who is believed to be the most senior Iraqi in the Sunni Islamist al Qaeda. Al-Mashadani, who was caught this month, has told his U.S. military interrogators a prominent al Qaeda-led group is just a front and its leader fictitious, a military spokesman said on July 18, 2007. Brigadier-General Kevin Bergner told a news conference that Abu Omar al-Baghdadi, leader of the self-styled Islamic State of Iraq, which was purportedly set up last year, did not exist.